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CVE-2026-23076

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ALSA: ctxfi: Fix potential OOB access in audio mixer handling In the audio mixer handling code of ctxfi driver, the conf field…

Published Feb 4, 2026CWE-125EPSS 0.15%

Overview

CVE-2026-23076 is a high-severity vulnerability. It was published on February 4, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: ctxfi: Fix potential OOB access in audio mixer handling

In the audio mixer handling code of ctxfi driver, the conf field is

used as a kind of loop index, and it's referred in the index callbacks

(amixer_index() and sum_index()).

As spotted recently by fuzzers, the current code causes OOB access at

those functions.

| UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48

| index 8 is out of range for type 'unsigned char [8]'

After the analysis, the cause was found to be the lack of the proper

(re-)initialization of conj field.

This patch addresses those OOB accesses by adding the proper

initializations of the loop indices.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276Refgit.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449aeRefgit.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387cRefgit.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174Refgit.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38Refgit.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedfRefgit.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23076?

CVE-2026-23076 is a high-severity vulnerability. It was published on February 4, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-23076?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23076?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-23076?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23076 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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